AD9517-1_15 Datasheet, PDF (63/80 Pages) Analog Devices – 12-Output Clock Generator with Integrated 2.5 GHz VCO

Data Sheet
AD9517-1
Reg.
Addr.
(Hex)
0x01A
Bits Name
Description
6
Reference
Sets the reference (REF1/REF2) frequency monitor’s detection threshold frequency. This does not affect the VCO
frequency monitor frequency monitor’s detection threshold (see Table 16: REF1, REF2, and VCO frequency status monitor parameter).
threshold
0: frequency valid if frequency is above the higher frequency threshold (default).
1: frequency valid if frequency is above the lower frequency threshold.
[5:0] LD pin control
Selects the signal that is connected to the LD pin.
Level or
Dynamic
5 4 3 2 1 0 Signal
Signal at LD Pin
0 0 0 0 0 0 LVL
Digital lock detect (high = lock, low = unlock) (default).
0 0 0 0 0 1 DYN
P-channel, open-drain lock detect (analog lock detect).
0 0 0 0 1 0 DYN
N-channel, open-drain lock detect (analog lock detect).
0 0 0 0 1 1 HIZ
High-Z LD pin.
0 0 0 1 0 0 CUR
Current source lock detect (110 µA when DLD is true).
0 X X X X X LVL
Ground (dc); for all other cases of 0XXXXXb not specified above.
The selections that follow are the same as REFMON.
1 0 0 0 0 0 LVL
Ground (dc).
1 0 0 0 0 1 DYN
REF1 clock (differential reference when in differential mode).
1 0 0 0 1 0 DYN
REF2 clock (not available in differential mode).
1 0 0 0 1 1 DYN
Selected reference to PLL (differential reference when indifferential
mode).
1 0 0 1 0 0 DYN
Unselected reference to PLL (not available in differential mode).
1 0 0 1 0 1 LVL
Status of selected reference (status of differential reference); active high.
1 0 0 1 1 0 LVL
Status of unselected reference (not available in differential mode);
active high.
1 0 0 1 1 1 LVL
Status REF1 frequency (active high).
1 0 1 0 0 0 LVL
Status REF2 frequency (active high).
1 0 1 0 0 1 LVL
(Status REF1 frequency) AND (status REF2 frequency).
1 0 1 0 1 0 LVL
(DLD) AND (status of selected reference) AND (status of VCO).
1 0 1 0 1 1 LVL
Status of VCO frequency (active high).
1 0 1 1 0 0 LVL
Selected reference (low = REF1, high = REF2).
1 0 1 1 0 1 LVL
Digital lock detect (DLD); active high.
1 0 1 1 1 0 LVL
Holdover active (active high).
1 0 1 1 1 1 LVL
Not available. Do not use.
1 1 0 0 0 0 LVL
VS (PLL supply).
1 1 0 0 0 1 DYN
REF1 clock (differential reference when in differential mode).
1 1 0 0 1 0 DYN
REF2 clock (not available in differential mode).
1 1 0 0 1 1 DYN
Selected reference to PLL (differential reference when in differential
mode).
1 1 0 1 0 0 DYN
Unselected reference to PLL (not available when in differential mode).
1 1 0 1 0 1 LVL
Status of selected reference (status of differential reference); active low.
1 1 0 1 1 0 LVL
Status of unselected reference (not available in differential mode);
active low.
1 1 0 1 1 1 LVL
Status of REF1 frequency (active low).
1 1 1 0 0 0 LVL
Status of REF2 frequency (active low).
1 1 1 0 0 1 LVL
(Status of REF1 frequency) AND (status of REF2 frequency).
1 1 1 0 1 0 LVL
(DLD) AND (status of selected reference) AND (status of VCO).
1 1 1 0 1 1 LVL
Status of VCO frequency (active low).
1 1 1 1 0 0 LVL
Selected reference (low = REF2, high = REF1).
1 1 1 1 0 1 LVL
Digital lock detect (DLD); active low.
1 1 1 1 1 0 LVL
Holdover active (active low).
1 1 1 1 1 1 LVL
Not available. Do not use.
Rev. E | Page 63 of 80